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Differences What are the advantages of each

Front view of Intel Core i7 940XM

Reasons to consider the
Intel Core i7 940XM

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Is unlocked Yes vs No Somewhat common; An unlocked multiplier allows for easier overclocking
Much lower typical power consumption 44.69W vs 85.31W Around 50% lower typical power consumption
Significantly more l3 cache per core 2 MB/core vs 1 MB/core 2x more l3 cache per core
Slightly more l3 cache 8 MB vs 6 MB Around 35% more l3 cache; more data can be stored in the l3 cache for quick access later
More threads 8 vs 6 2 more threads
Much lower annual home energy cost 13.25 $/year vs 25.29 $/year Around 50% lower annual home energy cost
Much lower annual commercial energy cost 48.18 $/year vs 91.98 $/year Around 50% lower annual commercial energy cost
Newer Jun, 2010 vs Jul, 2009 Release date 11 months later
Front view of AMD Opteron 2439 SE

Reasons to consider the
AMD Opteron 2439 SE

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Much more l2 cache 3 MB vs 1 MB 3x more l2 cache; more data can be stored in the l2 cache for quick access later
Higher clock speed 2.8 GHz vs 2.13 GHz More than 30% higher clock speed
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
More cores 6 vs 4 2 more cores; run more applications at once
More l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core

Features Key features of the Core i7 940XM  vs Opteron 2439 SE 

clock speed

Core i7 940XM
2.13 GHz
Opteron 2439 SE
2.8 GHz

L2 cache

Specifications Full list of technical specs

summary

Core i7 940XM  vs
Opteron 2439 SE 
Clock speed 2.13 GHz 2.8 GHz
Cores Quad core Hexa core
Socket type
rPGA 988A
F
Is unlocked Yes No

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
SSE2
MMX
SSE4
SSE3
SSE
SSE4.1
SSE4.2
3DNow!
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 55W 105W
Annual home energy cost 13.25 $/year 25.29 $/year
Annual commercial energy cost 48.18 $/year 91.98 $/year
Typical power consumption 44.69W 85.31W

details

Core i7 940XM  vs
Opteron 2439 SE 
Threads 8 6
L2 cache 1 MB 3 MB
L2 cache per core 0.25 MB/core 0.5 MB/core
L3 cache 8 MB 6 MB
L3 cache per core 2 MB/core 1 MB/core
Manufacture process 45 nm 45 nm
Max CPUs 1 2
Clock multiplier 16 14

integrated graphics

GPU None None
Label N/A N/A
Latest DirectX N/A N/A
Number of displays supported N/A N/A
GPU clock speed N/A N/A
Turbo clock speed N/A N/A
3DMark06 N/A N/A

bus

Architecture DMI HyperTransport 3.0
Intel Core i7 940XM
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AMD Opteron 2439 SE
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